Key electrical equipment delivered to Baltica 2 onshore substation

The construction of the onshore substation for the Baltica 2 offshore wind farm has reached a major milestone with the successful delivery of four power transformers and other high-voltage electrical equipment. For project partners PGE and Ørsted, this marks a significant step forward in the development of the onshore grid connection infrastructure required for the project.

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18 december 2025   |   15:28   |   Source: Gazeta Morska   |   Prepared by: Kamil Kusier   |   Print

fot. PGE Baltica

The delivery involved a complex multimodal logistics operation, including sea transport, port handling in Gdynia and Władysławowo, the use of tugs and barges, and night-time road transport using specialised multi-axle vehicles. Each power transformer weighs approximately 360 tonnes, comparable to the take-off weight of a fully loaded Boeing 777 aircraft.

- The delivery of the power transformers, as well as previously supplied electrical components, represents an important milestone in the construction of the onshore substation for Baltica 2. It was also a highly complex logistical operation. This facility in the Choczewo municipality will serve as our physical ‘plug-in’ to Poland’s National Power System, enabling electricity from Baltica 2 to reach around 2.5 million end users, said Bartosz Fedurek, CEO of PGE Baltica.

The delivered equipment includes 450 MVA power transformers supplied by GE Vernova, along with fixed and variable shunt reactors. The onshore substation is being built by a consortium of GE Vernova and Polimex Mostostal. Construction works are progressing, including the installation of 275 kV and 400 kV GIS switchgear and auxiliary systems. Busbar bridge gantries connecting the substation to the national grid have already been completed.

- From the onshore substation, we monitor and control the entire electrical infrastructure of the project, including offshore substations and wind turbines located approximately 40 kilometres from shore. Together with PGE, around 50 Ørsted engineers planned, designed and supported the construction of the electrical infrastructure, ensuring the highest standards of safety, occupational health and environmental protection. We are proud of how far the project has progressed and that we are now one step closer to supplying green electricity to 2.5 million Polish households, said Ulrik Lange, Managing Director of the Baltica 2 project at Ørsted.

The substation is located on a nearly 13-hectare site in Osieki Lęborskie, Choczewo municipality, in northern Poland. Electricity generated offshore will be transmitted to shore at 275 kV and then via a 6-kilometre cable route to the onshore substation, where the voltage will be stepped up to 400 kV and fed into the national transmission system through the nearby PSE Choczewo substation. HDD drilling works near the coastline are underway to connect the offshore and onshore cable sections while minimising environmental impact.

Testing and commissioning of the onshore substation are scheduled for 2026–2027. With a planned capacity of up to 1.5 GW, Baltica 2 is set to become Poland’s largest offshore wind farm when it comes online in 2027.

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morska energetyka wiatrowa Baltica 2 offshore wind Polska PGE Ørsted infrastruktura elektroenergetyczna

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